Brown-Séquard syndrome caused by a spinal subarachnoid hematoma due to anticoagulant therapy.

A case is reported of a patient with a pure Brown-Séquard syndrome caused by a spinal subarachnoid hematoma complicating anticoagulant therapy. None of the seven previously reported cases of spinal subarachnoid hematoma had led to this syndrome. The diagnosis, treatment, prognosis, and etiology of spinal subarachnoid hematoma are discussed.